Hot-air furnace.



l 1'? i" l l v. HUBIN.

H0 T AIR FURNACE.

APPLICATLON FILED JAN. 11,-191'8.

Patented Apr. 15, 1919.

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V.. RUBIN. l

HOT AIR FURNACE APPLICATION FILED IAN-III. 1918.

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Patented Apr. 15, 1919.

V. RUBIN.

HOT AIR FURNACE.

APPMGATIQN yFILED JAN. 11. 1918.

1,300,880. Y. Patented Apr,15,1919.

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V. RUBIN.

HOT AIR FURNACE.

APPLICATION FILED 1AN.II. ISIS.

Patented Apr. 15, 1919.

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UNITED srn'rns rnrnnr onmcn.

VICTOR RUBIN, 0F WINNIPEG, MANITOBA, CANADA.

HOT-AIR FURNACE.

Specication of Letters Patent.

Patented npr.. 15. wie.

l Application led January 11, 1918. Serial No. 211,436.

is of a high and uniform temperature; to so control the furnace gases and products of combustion that they may be circulated around the heat retaining means depending on whether desired; to adequately control the supply of air delivered to the furnace; to simplify the several parts and to render the same readily accessible `for inspection and gen-l erally to adapt the several parts to better perform the functions required of them.

With these'and other objects in view, the

invention consists essentially of the improvedv construction particularlyV described and set forth in the following specification and accompanying drawings forming part of the same.

In the drawings, Y p Figure 1 shows the furnace located in a portion of a building, partly in section and broken away.V i, c i l Fig. 2 is a vertical section of thefurnace. Fig.` 3 is a transverse section looking down l on the line 2-2 of Fig. 2.

F 1g. 4 is a transverse section looking upward y on the line 3`3 of Fig. 2. r

Fig. 5 is a transverse sectionlo'olcing down on the line 4-4 of Fig; 2. Fig. 6 is a transverse section looking upwardly on the line 5 5 of Fig. 2.

Fig. 7 is a sectional elevation of a modification of the invention. Fig. 8 is a transverse 6 6. 0f Fig. 7. 1 Fig. 9 is a transverse section on the line 8 8 of Fig. 7. f e

Like characters of reference refer to like section' on .the line parts in the several figures.

Referring tothe drawings, the furnace includes a fire box 10, the wall 11 of which y ma be formed of metal or the like and lined wit fire brick 12, the saidl iire box being provided with a grate 13, located above the of which the following is a specia high or low temperature is vof the furnace by opposite each other, `closed by a hinged damper 28, capable of ash pit 14, access to which is the doorway l5.

1 1 iire door 16 is also provided through which fuel may be fed to the fire box, which 1s covered by an upper wall 17 at the rear of which a Hue 18 is located.

This upper wall 17 is provided with a concentrlc orifice 19 above which a damper 20 operates, the lsaid damper being located in the perforated air chamber 21 concentrically gained through Alocated in the chamber 22, which 1s designed to be filled with broken glass, stones or like heat retaining means.

Airis delivered to the chamber 21 through the conduit 9 extending through the side wall of the furnace and closed by a damper 8, while the damper 20 is operated externally the rod 7.

The chamber 22 is surrounded by a flue 23 `divided into lower and upper compartments 24 and 25 communicating through the openings 26 and 27 located diametrically the opening 26 being being operated from the exterior of the furnace by the spindle 29 which forms a hinge The iiue 23 is closed at the upper end by the wall 30 and access to the upper and lower compartments' 24 and 25 is gained Ithrough the doors 31 and 32 located at the front of the furnace.

The compartment 25 is connected to the smoke pipe 37 provided with a sliding damper 38 adapted to control the draft and so govern the combustion of the fuel in the iire box 10.

The furnace is inclosed by a casing 33 spaced from the wall 11 of the furnace, providing a passageway 34 through which air is passed from the inlet pipes 35. Above one of these inlet pipes, a water pan 36 is located so that the air in its passage through the said jacket will take up the desired amount of moisture.

The casing 33 is providedon the upper end with a transversely extending wall 39 provided with a pair of discharge conduits 40 which permit of the air heated in the furnace being distributed to the several parts of the building in the manner at present practised in heating houses by hot air.

Each of the inlet pipes 35 communicates with a duct 41 in the wall of a building so that air will pass through the gratings 42 from the, atmosphere,

thus insuring a sup-- ply of pure air being delivered to the furnace for heating and Ventilating purposes.

1n that form of the invention illustrated in Figs. 7 to 9, the furnace B is provided with a lire box 10, the wall 11 of which is formed of metal or theV like and is surrounded by an outer wall 45 forming an angular compartment in which broken glass, stones or other like heat retaining means are packed.v Access to the lire box is gained through the door 16 and above the tire box a chamber 22a is located surrounded by a flue 23a which communicates with the fire box 10 in the lower wall of the chamber 22a.

A circular valve 46 is employed and is designed to coact with the ports 47 formed in the bottom of the chamber 22a. The valve 46 is provided with a spindle 48 carrying' a crank arm 49 which is actuated through the rod 50 extending through the lateral wall of he furnace thereby permitting the valve to be actuated externally.

By reference to Fig. 8 it will be seen that the flue 23a communicates by means of passage 51 with passages 52 and 53 in diametrically opposite sides of the flue 23a, said passages 52 and 53 communicating with the flue 54, so that as the products of combustion pass from the fire box into the flue 23L they are discharged through the passage '51 into the lues 52 and 53 and travel around the same and are delivered to the flue 54.

The opening 52 may be closed by a valve 55 which is vertically disposed and hinged to the wall of the flue 23, the said hinge being provided with a crank arm 56 connectedito the rod 57 which permits of the ready actuation of the valve.

31 is a cleaning-out door, whereby soot, ashes, or the like may be conveniently removed from the ue 54 which is in communication with the said pipe.

The furnace B is provided with an outer casing 33a which provides a passageway between the iire box-and the casing, so that air entering the said passageway through the inlet 58 can readily pass up and through the furnace B and be heated.

1n other respects this furnace 1s siinilar to that already described and need not be further enlarged upon.

The assembly of the several parts will be readily understood from the foregoing description.

The outer casing may be made in sections, as shown in Fig. 1, or formed of one piece of masonr as shown in Fig. 2.

When the furnace is in use and a ire is lighted in the fire box 10, the products of combustion pass upwardly through the flue 18 into the compartment 24 of the flue 23 and after circulating around the chamber 22 transmit heat to the glass or broken stone filling therein and the said products of combustion then pass through the opening 27 into the upper compartment 25 and after circulating around the chamber 22 pass through the smoke pipe 37 to the chimney.

yShould it be desired, however, to moderate the heat, the damper 28 may be opened so that the products lire, after passing through the flue `18 will only come in Contact Iwith the back of the chamber 22 and instead of circulating around the same will pass directly through the opening 26 into the smoke pipe 37 and thence to the chimney.

The air entering around the wall 11 of the'furnace is thus heated, and after the top of the furnace, it air passing through the inlet conduit which the air is highly heated.

It will thus be seen that the air from the passageway 34 and the air passing through the heat retaining medium will on intermixing be at an even high temperature, so that the air as delivered to the conduits 40a will adequately heat'the house in which the furnace is installed. Y

Should at any time the air chamber 21 become clogged with fine disintegrating particles entering the same through the perforations therein, this may be cleaned by opening the damper 20 by the spindle 7 and so permit the said accumulated dust falling through the orifice 19 into the fire boX.

'When that form of the invention' illustrated in Figs. 7 to 9 is in operation, the fire is stoked through the door 16 and the prodof combustion from the.v

through the pipe 35` passes through the' jacket 34 and circulating air has passed to the intermingles with the 9, the perforated chamber 21 and chamber 22, in

ucts of combustion rise upwardly and pass into the Hue 23a where they pass around the chamber 22a and so heat the broken glass, stone or other heat retaining means located therein. p

These products of combustion areV discharged through the opening 51 Vinto the flue 54 whence they pass to the rear of the furnace and are deliveredVV to the smoke pipe 37a. i

The air in the upper part of the furnace B may be permitted to pass through the chamber 22a by actuating the valve 46 and this heated air after leaving the said comthrough the passageway 34a between thecasing 33a and the body of 'thermal-..-ae

heated air being delivered thrughthe outlet conduits 40a to the several ,Ventilating ducts in the house.

Should it be found desirableto check the.:

heat in my Way, the Tod 57 is actuated so v i" that the valve 55 is closed and the products of combustion then pass upwardly and y directly into the smoke pipe 37a. n

By providingv ,a4 heat retaining medium surrounding the body of the furnace, it will be seen that the air in its passage through the inlet 58 and through the passageway 34 will be heated to a high even temperature so that a very great heat can be obtained with a furnace of this description.

As many changes could be made in the above description and many apparently widely different embodiments of my invention within the scope of the claims constructed without departing from the spirit 0r scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limited sense.

What I claim as new, is,

1. A hot air furnace including a Hre box, a compartment located above the fire box and adapted to be packed with heat retaining means and having a perforated air chamber with externally actuated valve, means for passing air through the compartment and means for circulating the products of combustion from the furnace around the compartment.

2. A hot air furnace including a fire box, a compartment located above the fire box and designed to be filled with heat retaining means and having a perforated air chamber with externally actuated valve, means for passing the products of combustion around the compartment, and a smoke pipe and valve means designed to control the passage of the products of combustion and deliver the same directly to the smoke pipe when it is desired to check the heat.

3. vA hot air furnace including a fire box, a compartment located above the fire box and designed to be filled with heat retaining means and having a perforated air chamber,

a valve in the compartment through which air is designed to pass and means for actuating the valve.

4. A hot air furnace including a fire box, a compartment located above the fire box Vand designed to be filled with heat retaining 5. A hot air furnace including a Hre box,

a compartment located above the Hre box and designed t0 be filled with heat retaining means and having a perforated air chamber, a pair of Hues surrounding the said compartment, means for circulating the products of combustion successively through each Hue and means for passing air 'through the said compartment.

6. A hot air furnace including a fire box, a compartment located above the fire box and designed to be filled with heat retaining means, a pair of Hues concentrically located around the said compartment, valve means in one of the flues designed to permit the products of combustion to pass successively .from one Hue to the other and means for` passing air through the compartment.

In testimony whereof I affix my signature in the presence of two witnesses.

VICTOR RUBIN.

Witnesses:

, F. E. BARBER,

M. A. PALMER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

